Notifications, or ways to alert you about updates when you do not have the Blink app open, are very similar across device operating systems. Android allows you to customize alert sounds per-app.
Certain Blink system alerts and events show you Push notifications according to your Notification Options. Motion alerts and doorbell presses create notifications that you can tap to enter Live View with two-way talk. The doorbell in Event Response will only allow tap for 60 seconds.
Push Notifications:
See the article about notifications not showing up on Android devices here.
The Blink app provides notifications on your mobile device to tell you what is happening with your Blink account and Blink systems. Notifications from a smartwatch are controlled by the watch settings.
Change your Notification Options on the Settings screen when you tap the "gear" icon 
in the footer of the Blink app.
Then tap the "Notification Options" section to access all of the settings.
Choose which events you want to receive notifications for, then tap the back arrow " < " to return to the Settings screen. The settings save automatically.
Certain actions like deleting a camera or camera system, will create an email to confirm that the action was intended.
You can control what other mobile devices have access to your account. Click to learn more about how to manage devices with Account Access.